For every honest treadmill fail—the weary jogger who simply faltered—there are hundreds of people who got exactly what they deserved— individuals who courted Internet fame and paid for it in blood.

The Ultimate Treadmill Fails Compilation is a collection of the latter. No one who takes a physio ball, unicycle, or pogo stick onto a running treadmill is worthy of your sympathy, so give him none. Just watch—and laugh.